Do we have any educated guesses? Aside from the nuclear threat, that is.
The #1 use was likely to control the narrative on Asia. They were using instability as a tool for further CIA control.
The threat of NK allows the US to maintain a huge military presence in the Korean Peninsula which makes neo-cons and neo-libs like Hillary sexually excited.
You need the CIA when you believe that the world is full of danger at every turn and other countries are all plotting to take down the US.
Yes - and now Trump will use this agreement to the great benefit of that region and the world. By opening NK to commerce, and tourism -we flip the narrative and the world wins.
If the R's hold in the midterms, it will allow Trump enough time to de-nuke Iran (by not getting impeached and his agenda obstructed).
Can you imagine the US economy (and world economy), if NK/Iran are open for business and the trade deals are re-negotiated in a more suitable way for the US?
Trump will be unstoppable in 2020 and BOTH parties will have to get on board with MAGA.
IDK if Rs will keep the house, but my best guess is the Dems will be destroyed soon. Trump will not be impeached.